<template>
  <div class="videodome">
    <div>
      <video
        id="videoCamera"
        width="250"
        height="250"
        autoplay
        style="border-radius: 180px; box-shadow: darkgrey 0 0 30px 5px"
      ></video>
    </div>
    <canvas
      style="display: none"
      id="canvasCamera"
      width="250"
      height="250"
    ></canvas>
  </div>
  <div class="img_bg_camera">
    <p style="color: #000000">图片显示</p>
    <img
      :src="imgSrc"
      alt=""
      class="tx_img"
      style="border-radius: 360px; box-shadow: darkgrey 0 0 30px 5px"
      v-if="imgif"
    />
  </div>
  <div class="bommen">
    <el-button type="success" @click="getCompetence()">打开摄像头</el-button>
    <el-button type="success" @click="setImage()">拍照</el-button>
    <el-button
      type="primary"
      @click="openFullScreen1"
      v-loading.fullscreen.lock="fullscreenLoading"
      >提交
    </el-button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      imgif: false,
      videoWidth: 250,
      videoHeight: 250,
      imgSrc: "",
      thisCancas: null,
      thisContext: null,
      thisVideo: null,
      imga: "",
    };
  },
  created(){
    // this.getCompetence()
  },
  methods: {
    getCompetence() {
      var _this = this;
      this.thisCancas = document.getElementById("canvasCamera");
      this.thisContext = this.thisCancas.getContext("2d");
      this.thisVideo = document.getElementById("videoCamera");
      // 旧版本浏览器可能根本不支持mediaDevices，我们首先设置一个空对象
      if (navigator.mediaDevices === undefined) {
        navigator.mediaDevices = {};
      }
      // 一些浏览器实现了部分mediaDevices，我们不能只分配一个对象
      // 使用getUserMedia，因为它会覆盖现有的属性。
      // 这里，如果缺少getUserMedia属性，就添加它。
      if (navigator.mediaDevices.getUserMedia === undefined) {
        navigator.mediaDevices.getUserMedia = function (constraints) {
          // 首先获取现存的getUserMedia(如果存在)
          var getUserMedia =
            navigator.webkitGetUserMedia ||
            navigator.mozGetUserMedia ||
            navigator.getUserMedia;
          // 有些浏览器不支持，会返回错误信息
          // 保持接口一致
          if (!getUserMedia) {
            return Promise.reject(
              new Error("getUserMedia is not implemented in this browser")
            );
          }
          // 否则，使用Promise将调用包装到旧的navigator.getUserMedia
          return new Promise(function (resolve, reject) {
            getUserMedia.call(navigator, constraints, resolve, reject);
          });
        };
      }
      var constraints = {
        audio: false,
        video: {
          width: this.videoWidth,
          height: this.videoHeight,
          transform: "scaleX(-1)",
        },
      };
      navigator.mediaDevices
        .getUserMedia(constraints)
        .then(function (stream) {
          // 旧的浏览器可能没有srcObject
          if ("srcObject" in _this.thisVideo) {
            _this.thisVideo.srcObject = stream;
          } else {
            // 避免在新的浏览器中使用它，因为它正在被弃用。
            _this.thisVideo.src = window.URL.createObjectURL(stream);
          }
          _this.thisVideo.onloadedmetadata = function (e) {
            _this.thisVideo.play();
          };
        })
        .catch((err) => {
          console.log(err);
        });
    },
    //  绘制图片（拍照功能）

    setImage() {
      this.imgif = true;
      var _this = this;
      // 点击，canvas画图
      _this.thisContext.drawImage(_this.thisVideo, 0, 0, 250, 250);
      console.log(_this.thisContext);

      // 获取图片base64链接
      var image = this.thisCancas.toDataURL("image/png");
      _this.imgSrc = image;
      window.sessionStorage.setItem("img", _this.imgSrc);

      console.log(this.imgSrc);
    },
    //关闭摄像头并上传数据
    openFullScreen1() {
      this.thisVideo.srcObject.getTracks()[0].stop(), //关闭摄像头
        setTimeout(() => {
          // var file = this.imga.substr(22)
          this.imga = window.sessionStorage.getItem("img");
          var file = this.imga;
          console.log(file);
          //base64数据放formData里面
          var formData = new FormData(); //*
          formData.append("multipartFile", file); //*
          formData.append("password", this.ruleForm.password); //*
          formData.append("username", this.ruleForm.name); //*
          //自己配置axios。
          // this.$http.post('url接口', formData).then(res => {
          // 	console.log(res);

          // })
        }, 2000);
    },
  },
};
</script>

<style></style>
